Kurt Busch is breaking his silence on his younger brother Kyle Busch 's tragic death ... saying it's crushed him. 47-year-old Kurt -- who was nearly seven years older than Kyle -- addressed the devastating loss in a statement posted on social media on Monday ... and it's heartfelt. “Kyle, your passion, determination, and love for your family inspired everyone who knew you. No trophy, championship, or accomplishment could ever measure the impact you had on my life and on so many others. I will